Radiologic impact on operative access to a retrorectal cyst.

Diverse incisions have been used to excise retrorectal lesions. Operative access must be planned with regard to level and type of lesion, and prevention of postoperative complications. In this case, pelvic contrast CT scan conclusively showed communication between the rectum and a retrorectal cyst-hamartoma. A potential rectocutaneous fistula through the previously planned parasacrococcygeal incision was avoided by this preoperative documentation.